Swab



FIG. 1 is a front perspective view of a swab according to a first embodiment of the new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a front perspective view of a swab according to a second embodiment of the new design;

FIG. 7 is a rear view thereof;

FIG. 8 is a left side view thereof;

FIG. 9 is a top view thereof; and,

FIG. 10 is a bottom view thereof.

The broken lines illustrate portions of the swab that form no part of the claimed design. 

CLAIM The ornamental design for a swab, as shown and described. 